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	Phase-field modeling of stacking structure formation and transition of delta-hydride precipitates in zirconium
	Han, G. M.1,2; Zhao, Y. F.1,2; Zhou, C. B.3; Lin, De-Ye1,2,4; Zhu, X. Y.1,2; Zhang, J.3; Hu, S. Y.5; Song, H. F.1,2,4
刊名	Acta materialia
	2019-02-15
卷号	165页码:528-546
关键词	Delta-hydride Stacking structure formation and transition Interfacial energy anisotropy Elastic interaction Phase-field model
ISSN号	1359-6454
DOI	10.1016/j.actamat.2018.12.009
通讯作者	Hu, s. y.(shenyang.hu@pnnl.gov) ; Song, h. f.(song_haifeng@iapcm.ac.cn)
英文摘要	Delta-hydride structures in zr nuclear fuel-rod cladding significantly affect mechanical properties. a micromechanical phase-field model is developed to investigate the effect of interfacial energy anisotropy and elastic interaction on the nucleation, stacking structure formation, and stacking structure transition of delta-hydrides. it is found that the nucleation probability and growth of delta-hydride near pre-existing hydrides are strongly spatially dependent. results show that (1) the delta-hydride has a platelet-like shape. the large shear deformation associated with lattice mismatches and a small interfacial energy of its broad interface cause the orientation of the delta-hydride off the basal plane approximately 14.7 degrees. (2) stress-induced nucleation of delta-hydrides near a pre-existing hydride results in the unique stacking structure formation. (3) the morphology and alignment of stacking structures, called as macroscopic hydrides which consist of microscopic hydrides with certain stacking sequences, change under stresses. the alignment of macroscopic hydrides changes from along the circumferential direction to along the radial direction under tensile hoop stress while the orientation of microscopic hydrides remains parallel to the basal plane. these results are in agreement with experimental observations. the simulations reveal that stress-induced heterogeneous nucleation and growth is the mechanism for the formation and transition of unique macro-hydride stacking structures. (c) 2018 acta materialia inc. published by elsevier ltd. all rights reserved.
WOS关键词	LAMELLAR STRUCTURE FORMATION ; MARTENSITIC-TRANSFORMATION ; MECHANICAL-PROPERTIES ; STRESS-REORIENTATION ; COMPUTER-SIMULATION ; ELASTIC INTERACTION ; NUCLEUS FORMATION ; FORMATION PATH ; STRAIN-ENERGY ; IN-SITU
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000457665100047
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2374264
专题	计算机网络信息中心
通讯作者	Hu, S. Y.; Song, H. F.
作者单位	1.Inst Appl Phys & Computat Math, Fenghao East Rd 2, Beijing 100094, Peoples R China 2.CAEP Software Ctr High Performance Numer Simulat, Huayuan Rd 6, Beijing 100088, Peoples R China 3.Chinese Acad Sci, Comp Network Informat Ctr, Beijing 100080, Peoples R China 4.Inst Appl Phys & Computat Math, Lab Computat Phys, Huayuan Rd 6, Beijing 100088, Peoples R China 5.Pacific Northwest Natl Lab, POB 999, Richland, WA 99352 USA
推荐引用方式 GB/T 7714	Han, G. M.,Zhao, Y. F.,Zhou, C. B.,et al. Phase-field modeling of stacking structure formation and transition of delta-hydride precipitates in zirconium[J]. Acta materialia,2019,165:528-546.
APA	Han, G. M..,Zhao, Y. F..,Zhou, C. B..,Lin, De-Ye.,Zhu, X. Y..,...&Song, H. F..(2019).Phase-field modeling of stacking structure formation and transition of delta-hydride precipitates in zirconium.Acta materialia,165,528-546.
MLA	Han, G. M.,et al."Phase-field modeling of stacking structure formation and transition of delta-hydride precipitates in zirconium".Acta materialia 165(2019):528-546.

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